<template>
    <div class="Login">
        <div class="login_container">
            <div class="login_box">
                <!-- 头像区域开始 -->
                <div class="avatar_box">
                    <img src="../assets/logo.png" alt="">
                </div>
                <!-- 头像区域结束 -->
                <!-- form表单区域开始 -->
                <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                    <!-- 用户名 -->
                    <el-form-item prop="username">
                        <el-input v-model="loginForm.username" prefix-icon="iconfont icon-icon_user"></el-input>
                    </el-form-item>
                    <!-- 密码 -->
                    <el-form-item prop="password">
                        <el-input type="password" v-model="loginForm.password" prefix-icon="iconfont icon-3702mima"></el-input>
                    </el-form-item>
                    <!-- 按钮区域 -->
                    <el-form-item class="btns">
                        <el-button type="primary" @click="login">登录</el-button>
                        <el-button type="info" @click="resetLoginForm">重置</el-button>
                    </el-form-item>
                </el-form>
                <!-- form表单区域结束 -->
            </div>
        </div>
    </div>
</template>
<script>
export default {
    name: 'Login',
    data(){
        return{
            // 这是登录表单的数据绑定对象
            loginForm: {
                username: 'zs',
                password: '123'
            },
            // 这是表单的验证规则对象
            loginFormRules: {
                // 验证用户名是否合法
                username: [
                    { required: true, message: '请输入登录名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                // 验证密码是否合法
                password: [
                    { required: true, message: '请输入登陆密码', trigger: 'blur' },
                    { min: 6, max: 25, message: '长度在 6 到 25 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    methods:{
        // 点击重置按钮，重置登录表单
        resetLoginForm(){
            // console.log(this)
            this.$refs.loginFormRef.resetFields()
        },
        login(){
            this.$refs.loginFormRef.validate(async valid=>{
                // console.log(valid)
                if (!valid) {
                    return false
                }
                const {data:res} =await this.$http.post('login',this.loginForm)
                console.log(res)
                if (res.meta.status !== 200) {
                    return this.$message.error('登录失败！');
                }
                 this.$message.success('登录成功！')
                //  1.将登录成功之后的token，保存到客户端的sessionStorage 中
                    // 1.1 项目中除了登录之外的其他API接口，必须在登录之后才能访问
                    // 1.2 token 只应在当前网站打开期间生效，所以将token保存在sessionStorage中
                    window.sessionStorage.setItem("token",res.data.token)
                //  2.通过编程式导航跳转到后台主页，路由地址是home
                    this.$router.push('/home')
            })
        }
    }
}
</script>
<style lang="less" scoped>
.Login{
    background-color: #2b4b6b;
    height: 100%;
}
    .login_container{
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: relative;
        top: 50%;
        left: 50%;
        transform: translate(-50%,-50%);
        .avatar_box{
            width:130px;
            height: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #ddd;
            position: absolute;
            left: 50%;
            transform: translate(-50%,-50%);
            background-color: #fff;
            img{
                height: 100%;
                width: 100%;
                border-radius: 50%;
                background-color: #eee;
            }

        }
    }
    .btns{
        display: flex;
        justify-content: flex-end;
    }
    .login_form{
        width:100%;
        position: absolute;
        bottom: 0;
        box-sizing: border-box;
        padding: 0 20px;
    }
</style>